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3 level dependent dropdown - change 1st master reset all?

Thread began 4/03/2013 3:20 pm by Andrew Read | Last modified 4/12/2013 4:16 pm by Andrew Read | 1969 views | 32 replies

Jason ByrnesWebAssist

this code:
[code] onchange="setPrice(document.form1.select[document.form1.select.selectedIndex].value);"[/php]

passes the value for the selection to the function.

using my sample select list:

<select name="select" id="select" onchange="setPrice(document.form1.select[document.form1.select.selectedIndex].value);">
<option value="1">one</option>
<option value="2">two</option>
<option value="3">three</option>
<option value="4">four</option>
</select>



if you select "three" the value "3" is passed to the function in the onchange event:

onchange="setPrice(3);"



if you select four, the value 4 is passed:

onchange="setPrice(4);"



the array is created with ID values, and prices that correspond:

var prices = new Array
prices["1"] = "2.50";
prices["2"] = "3.00";
prices["3"] = "3.50";
prices["4"] = "4.00";



the if statement:

if(prices[selectedID]) {
document.form1.textfield.value = prices[selectedID];
}



looks to see if the selected ID exists as an array index, if it does, it passes the corresponding price.

so if you select four, the value 4 is passed, the if statement becomes:

if(prices["4"]) {
document.form1.textfield.value = prices["4"];
}



in other words the array index "4":
prices["4"] = "4.00"

so the value of the textfield is set to "4.00"

Select three, and the array index "3" will be used:
prices["3"] = "3.50";

and the value of the textfield will be set to "3.50"

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